A review of how some noncitizens were able to register to vote in Arizona confirms an ABC15 report that uncovered incompatibilities between state laws.

The review found at least one instance where officials came across the problem but didn't raise alarms with a state agency that could have fixed it.

Democratic Arizona Gov. Katie Hobbs renewed a push Thursday to regulate groundwater in rural parts of the drought-stricken state.

The overall goal is to reduce groundwater overdraft, a condition in which more water is drawn from a well or aquifer than is ...

Experts say cultivating genetic diversity and mitigating Phoenix’s urban heat island must occur to protect native plants.

Our work in 2024 has changed laws and held public officials accountable. Here's what to know about The Arizona Republic's ...